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v uitrit ttu-trs 1 WILLIAMLoToBe, or', ORANGE, MASSACHUSETTS.

I 4 44Letter?,Patent1%.'665'197, .dated July 16, 1867.y i

7 lIfmnovsn PoPBLLsn.

To ALL WHoM 1T MAY ooNoERN:

Be it known that I, WILLIAM A. COBB, oi' Orange, xn the county of Franklin, and State oi' Massachusetts, have invented a new and useful improvement in Propelling Vessels; and I do hereby declare that the following is a full, clear, and exact description thereof,which will enable others' skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part. of this specification, in which- Fignre 1 is a top view of my improved'det'ached propeller. 'v

Figure 2 isal vertical eross section `of the same, taken through the line a: z, iig. 1.

lSimilar letters of reference indicate like parts. Y

My invention has for its' object t'o .furnish an imprzoged propeller by means of which. vessels may be propelled with greater speed, and with much less bulk and weight of maehinerythan is possible with the devices now in use; and'it consists in the combination of the frame, or .its equivalent,.th'e paddles, the crank or chi-anke, the adjustable wheels, or, their equivalent, the shackle-bars and the driving-rodswith each-other, and with the sills' or frame upon which the whole rests, as hereinafter more fully described.

A are the sills or framsnpon which the apparatus rests, and which is connected to andn supported by the i frame of the vessel. Upon the sills A are formed the bearings B for the crank-shafts 0the cranks c'- of which work in the frame Dto or within which a series loi' paddles, E, is attached, which by the action of the cranks c descend intoI the water, move back through it, rise and move forward above the water, and so on continuously, rapidly propellingl the vessel through the water. To the outer ends of the cranksrC are attached wheels F, which, if desired, may be replaced by crank-arms. G are shackle-bars connecting all the crank-wheels of the same frame D upon one side, so that they may all `.move together.' H are the driving-rods 4by which 'motion is communicated to the apparatus from the engine. These machines are attached'to the sides of thel vessel opposite to each other, one, two, or three being placed upon each side of ythe vessel', and each operated entirely independent of the others.V These machines may all act ltogether, either forward or backward; or those on one side may work forwsrdgwhile `those upon the other side are made -to back-water or -work backward, tnrningthe vessel in a very short space. In bringing the vessel up to thewind in a stiiiV breeze, all the propellers upon the Windward side may bevoperated, while only one or two are used upon the lee side,thus enabling the essel to be inuch more easily and readily kept to her course than when controlled entirely by the rudder.

I claim as new, and desire to secure by Letters Patent- The propeller constructed asdescrihed, consisting of the frame D having the series -of vertical paddles E, and hung at each end upon the crank-shafts .0, between. the sills A, said erankshafts connected bythe crankwheels F and shackle-bars G, all operated directly from'the engine by the driving-bars'H, as hereinshown and described for the purpose specified.

` WILLIAM A. COBB..

Witnesses:

Moses C. Fnnucn, NELSON S. Wsxnrxsnn. 

